19 lcd\例程19-1\c8051F040.h ......\........\lcd_test1.c ......\.......2\c8051F040.h ......\........\mylcd.h ......\........\PUTCHAR.C ......\........\withlib.c ......\.......3\c8051F040.h ......\........\lcd.h ......\........\lcd_menu.c ......\........\PUTCHAR.C ......\例程19-1 ......\例程19-2 ......\例程19-3 19 lcd